Avtron Model T477W Bonding Meter
with B14703 Battery Pack Replacement Instructions
Part Number T477WC15292
Calibration and Maintenance Procedures
Subject to the EAR, ECCN [9E610.a].
This information is subject to the export control laws of the United States, specifically including the Export Administration Regulations (EAR),
15 C.F.R. Part 730 et. seq. Transfer, retransfer, or disclosure of this data by any means to a non-U.S. person (individual or company), whether in the United States or abroad, without any
required export license or other approval from the U.S. Government is prohibited, including without limitation any diversion to a military end user or use in a military end use application.
4-2
K777
T477W
Tolerance
T477W
Switch
Milliohm
(in milliohms)
Display
Position
Range
Reading
Zero
2.000
+/-0.002*
_______
0.10
2.000
+/-0.006
_______
1.00
2.000
+/-0.015
_______
1.00
20.00
+/-0.06
_______
10.0
20.00
+/- 0.15
_______
10.0
200.0
+/-0.6
_______
100
200.0
+/-1.5
_______
100
2000
+/-6
_______
1000
2000
+/-15
_______
* The 0.002 milliohm tolerance is an internal unpublished specification. The official published
specification is 0.005 milliohms for the 2 milliohm range. All other ranges are as pub/-
5 least significant digits for the allowable zero error.
3.
This completes the field verification procedure. There are no user adjustable components. If an alignment failure is
found during the verification, contact Avtron Aerospace, Inc., to return the unit for repair.
NOTE
Perform the above field calibration procedure after a full charge while on a non-metallic work
surface without any other T477W Bonding Meters in the near vicinity.
The K777 unit provides a good field verification of the T477W Bonding Meter’s performance excluding the probes. The
probe sets should also be tested to verify that they provide proper readings with the Bonding Meter. Avtron provides
calibration service on both the T477W and the K777 products.
Our calibration service provides, in addition to the K777 test values, the following: environmental tests from 5 degrees to 140
degrees Fahrenheit; battery response/endurance at the preceding extremes, accuracy of the unit at the preceding extremes,
uncertainties induced from the different styles of probes, auto-shutoff time verification, charging waveform check, the unit’s
burden/threshold levels and additional measurement test points not available on the K777. The calibration includes a detailed
certificate and data if requested. Factory repair is available at additional cost if required.
Prior to sending equipment to Avtron Aerospace, Inc., for calibration or service, please contact us to receive an RMA number
and instructions on where to send the items. Please visit our website for contact and product information at
http://www.avtronaero.com/rma.htm
